Attributes / relations provided by
♦ ¹FOOD OF THE SQUAWFISH Ptychocheilus oregonensis (Richardson) OF THE LOWER COLUMBIA RIVER, RICHARD B. THOMPSON, FISHERY BULLETIN 158 (1959)
♦ ²Hansson, S., Karlsson, L., Ikonen, E., Christensen, O., Mitans, A., Uzars, D., Petersson, E. and Ragnarsson, B. (2001), "Stomach analyses of Baltic salmon from 1959–1962 and 1994–1997: possible relations between diet and yolk-sac-fry mortality (M74)". Journal of Fish Biology, 58: 1730–1745